How the PAYG Withholding regime works
19The "pay as you go" (PAYG) withholding regime is established by provisions including Division 12 of Schedule 1 to the TAA. Pursuant to s 12-35 of the TAA, an entity must withhold an amount from the salary, wages, commission, bonuses or allowances it pays to an individual as an employee (whether of that or another entity). Section 12-35 expressly does not require that the entity making the payments be the employer of the employees.
20Section 16-70 of Schedule 1 to the TAA sets out the payer's obligation to remit the amount withheld to the Commissioner of Taxation ("the Commissioner") as follows:
"An entity that withholds an amount under Division 12 must pay the amount to the Commissioner in accordance with this Subdivision."
21Amounts so withheld and remitted to the Commissioner are credited against the income tax payable by the employee under s 6-5 of the Income Tax Assessment Act 1997 (Cth) ("ITAA 1997") or other sections of the income tax legislation (s 18-15 of Schedule 1 to the TAA). The remitted amounts cause a corresponding reduction in the employees' income tax liability.
22The "estimate" regime in Part VI, Division 8 of the Income Tax Assessment Act 1936 (Cth) ("ITAA 1936") was introduced in 1993. It contained ss 222AFA to 222AMB. The purpose of the estimate regime is to promote the timely and efficient recovery of amounts that have not been remitted to the Commissioner despite a liability to withhold and remit them under provisions such as s 12-35 of Schedule 1 to the TAA (s 222AFA(1) of the ITAA 1936). Before this regime, the Commissioner could recover these amounts from the payer but first had to establish the exact amount of the liability, by which time the "efficient and timely recovery of unremitted deductions" was often frustrated (Explanatory Memorandum to Insolvency (Tax Priorities) Legislation Amendment Bill, Chapter 2; see also s 222AFA of the ITAA 1936).
23The estimate regime allows the Commissioner to estimate the amount by which a payer is liable to remit on account of its withholding obligations, and demand payment of that estimate (s 222AHA(1) of the ITAA 1936). The payer has opportunities to declare that no amount was remitted or prove that there is no withholding obligation (ss 222AGC(1), 222AGD(1) and 222AHC(2) of the ITAA 1936).
24The provisions of the estimate regime, such as s 222AHB of the ITAA 1936, ensure that the Commissioner will not ultimately recover more by way of estimates than the amount of the underlying liability (in this context, the underlying liability is the payer's liability to withhold under a section such as s 12-35 of the TAA). Unless and until the underlying liability is shown to be zero, or an amount less than the estimate, the Commissioner is entitled to recover the amount of the estimate (ss 222AHA(1), 222AHB and 222AHC of the ITAA 1936).
25On 1 July 2010 the Tax Laws Amendment (Transfer of Provisions) Act 2010 (Cth) repealed Part VI of the ITAA 1936, including the estimate provisions in former Division 8 of Part VI. The new estimate provisions, which came into force on 1 July 2010 were inserted as Division 268 of Schedule 1 to the TAA (Schedule 1, Part 1 Item 10 of the Tax Laws Amendment (Transfer of Provisions) Act 2010 (Cth)). Generally, the same mechanism is in place.
26Schedule 1, Part 3 Item 58 of the Tax Laws Amendment (Transfer of Provisions) Act 2010 (Cth) provides that an existing estimate remains in force from the commencement time as if it had been made under s 268-10 in Schedule 1 to the TAA. The Commissioner may estimate the unpaid and overdue amount of a liability based upon what the Commissioner thinks is reasonable (sub-ss 268-10(1), (2) and (3) of the TAA). The Commissioner must give written notice of the estimate and sets out the content of the notice (s 268-15 of the TAA). Despite s 29 of the Acts Interpretation Act 1901 (Cth), the written notice is taken to have been given at the time the Commissioner posts it to the defendant (s 268-15(4) in Schedule 1 of the TAA) or otherwise makes the notice available.
27The recipient of the notice is then liable to pay the estimate (sub-ss 268-20(1), (2) and (3) of the TAA).
28The estimate may be revoked or reduced in certain circumstances, for instance upon the giving of a statutory declaration within 7 days after the Commissioner gave the written notice. Such a declaration should contain facts sufficient to prove that the underlying liability never existed, or is less than the estimate (s 268-40 of the TAA; item1 of s 268-40 of the TAA). The underlying liability is as defined in s 268-10(1) of the TAA. In the case of a company that has a director, sub-s 268-90(3) of the TAA provides that the statutory declaration or affidavit must be made, sworn or affirmed by a director.
29Amounts due and payable under an estimate notice may be recovered in accordance with Part 4-15 of Schedule 1 to the TAA (s 222AFA(5) of the ITAA 1936). General interest charge accrues on these amounts while they remain outstanding (ss 8AAA-8AAH, 8AAZF of the TAA). An estimate of unremitted amounts is a "tax-related liability" (s 250-10(1), Sch 1 to the TAA, item 65) and as such is a debt due to the Commonwealth and payable to the plaintiff (s 255-5, Sch 1 of the TAA). Similarly, the general interest charge is a debt due and payable to the Commonwealth and to the plaintiff (s 250-10(2), Sch 1 of the TAA, items 70, 125, 130, and 135).